Definition
An internet-based service that distributes World Area Forecast System (WAFS) products — including significant weather charts and upper-air wind and temperature forecasts — to pilots, dispatchers, and flight planners. The service delivers gridded forecast data and chart files produced by the World Area Forecast Centers in Washington and London for use in international flight planning.
Plain English
A website-based delivery system that gives pilots and flight planners the official global weather forecasts they need for long-distance and international flights. Instead of receiving the charts by fax or older datalinks, users download them over the internet.
Context Anchor
Seen in aviation weather, flight planning, dispatch, and international flight operations.
Derivation
The name describes the function: a file service, delivered over the internet, providing World Area Forecast System products. Knowing that WAFS itself is a global aviation weather forecasting program (run jointly by the U.S. and U.K. under ICAO) helps explain why the file service exists — it is simply the modern delivery channel for those forecasts.
Why Pilots Care
Provides reliable global weather data needed for safe route selection and fuel calculations.
Intuition Check
Do not read this as a general weather website. In aviation, Wafs Internet File Service refers to a specific source of official forecast files used for flight planning.
Example Sentence 1
The dispatcher pulled the upper-wind charts from the WAFS Internet File Service before finalizing the transatlantic flight plan.
Example Sentence 2
Operators rely on the Wafs Internet File Service to receive updated SIGWX charts for international routes.